这应该让您开始：

<?php

$the_query = new WP_Query( array(
    \'post_type\'   => \'kalender_item\',
    \'post_status\' => \'publish\',
    \'meta_key\'    => \'kalender_item_datum\',
    \'orderby\'     => \'meta_value\'
) );

# This will hold what group we\'re in
$current_header = \'\';

# The Loop
while ( $the_query->have_posts() ) :
    $the_query->the_post();

    # get the datum for this post
    $temp_date = get_post_meta( get_the_ID(), \'kalender_item_datum\', true );

    # If they aren\'t the same, we\'ll start a new group, which for now
    # just means setting a new heading
    if ( $temp_date != $current_header ) {
        $current_header = $temp_date;
        echo "<h2>$current_header</h2>";
    }

    # ... do normal loop stuff here

endwhile;

?>

这应该让您开始：

<?php

$the_query = new WP_Query( array(
    \'post_type\'   => \'kalender_item\',
    \'post_status\' => \'publish\',
    \'meta_key\'    => \'kalender_item_datum\',
    \'orderby\'     => \'meta_value\'
) );

# This will hold what group we\'re in
$current_header = \'\';

# The Loop
while ( $the_query->have_posts() ) :
    $the_query->the_post();

    # get the datum for this post
    $temp_date = get_post_meta( get_the_ID(), \'kalender_item_datum\', true );

    # If they aren\'t the same, we\'ll start a new group, which for now
    # just means setting a new heading
    if ( $temp_date != $current_header ) {
        $current_header = $temp_date;
        echo "<h2>$current_header</h2>";
    }

    # ... do normal loop stuff here

endwhile;

?>